Chapter 5 - Integumentary System

Keratinocytes of the epidermis are usually present for about ____ week(s).

4

The integument accounts for about _____% of the body weight.

8

Hair follicles begin to appear between ______ weeks of development as pockets of cells called hair ______.

9-12, buds

Which best describes the differences between sensible and insensible perspirations produced by sweat glands in the skin?

Insensible is in the form of water vapor and cannot be seen while sensible contains water and salts and can be seen.

sweat glands

The glands that secrete sweat, located in the dermal layer of the skin.

A hemangioma is a congenital anomaly that results in skin discoloration due to ______ that proliferate and form a benign tumor.

blood vessels

In the nails, the lunula appears whitish because a thickened underlying stratum basale obscures the underlying ______.

blood vessels

Another name for the skin is the ______ membrane.

cutaneous

During development of the integument, the epidermis is derived from ______, while the dermis is derived from ______.

ectoderm, mesoderm

In the second step of wound healing, a blood clot temporarily patches the ______ of the wound together and acts as a barrier to prevent the entry of ______ into the body.

edges, pathogens

The skin is made up of two distinct layers, the _____ and the _____.

epidermis, dermis

hirsutism

excessive hair growth

alopecia

hair loss

The whitish semilunar area of the proximal end of the nail body is called the ______.

lunula

Late in the fetal period, the mammary gland develops an external epidermal depression called the ______.

mammary pit

Sabaceous glands

secrete sebum (oil) into the hair follicles where the hair shafts pass through the dermis

what two exocrine glands are housed in the skin?

sweat glands and sebaceous glands

Fingernails and toenails start to form in the _______ week of development.

tenth

Under normal conditions, some interstitial fluids slowly escape through the epidermis via a process called ______ water loss.

transepidermal

The combination of periderm and sebum comprise a waterproof coating called the ______.

vernix caseosa